Unity3D Client And C# Server Framework
Simple GTK# Paint Program
Free and open source real-time strategy game
Ct.js is a desktop game engine that makes learning programming fun
Desktop/Android/HTML5/iOS Java game development framework
The HTML5 Creation Engine
A free mixin-based injection hacked client for Minecraft
Source code repository of the FreeOrion project
High performance UI layout library in C
Multi-platform 2D and 3D game engine
A game framework written with osu! in mind.
The flexible game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Free game engine for development of desktop, mobile, and web games
A shield for the Arduino Mega that can back up video game cartridges
FiveM is a modification for Grand Theft Auto V
3D modeler, 3D game maker, 3D demo maker
API (C#) for simulating certain aspects of a ZX spectrum for porting.
Mech Station Beta - Tower Defense like Game
A free 3d game for PC that does not limit the player. Fight,Build,Gain
Game engine supporting many 3D/2D formats and graphic effects
World Class Leader Board Editor.
Haskell game engine library for roguelike dungeon crawlers
Turn based tactical RPG with several campaigns, written in Rust